Hose coupling



Feb. 25, 1936.

J. P. EASTMAN HOSE COUPLING Original Filed Sept. 24, 1930 3 Sheets-Sheet1 Feb. 25, 1936. J. P. EASTMAN HOSE COUPLING Original Filed Sept. 24,1930 3 Sheets-Sheet 2 Jwventop yaw 3f JkJ/mafi Feb. 25, 1936. J EASTMANRe. 19,865

HOSE COUPLING Original Filed Sept. 24, 1930 3 Sheets-Sheet 3 gwuwntozReissues] Feb. 25, 1936 UNITED STATES PATENT OFFICE her 24. for reissueMay 23, 1935, Serial No. 28,133

17 Claims. (Cl. 285-84) This invention relates to hose clamps orconnections and to themethod of clamping the end of a hose.

Objects of this invention are to provide a connection for a how whichwill not blow oil, even imder high pressure, and which will not permit1.

Further objects are to provide a connection which secures two grips uponthe end of the hose, one grip engaging the strongest portion of thehose, and the other grip the outer portion of the hose.

More specifically, objects of this invention are to provide a novelmeans of securing a connection to the end of a hose provided with a wireshell, forming an internal reinforcement, in such a manner that theconnection grips the wire shell as well as the hose body and thussecures the utmost strength of grip. thereby permitting the hose to beused safely with very high internal pressures without danger of blowingoil the connection or of causing a leak to form adjacent the connection.

Further objects are to provide a novel method of seeming a connection tothe end of a hose provided with a reinforcing shell, such methodcontemplating not only gripping the hose body but also providing a wayof gripping the reinforcing shell, and further providing a meansforforming an internal neck ring which tightly grips the reinforcing shellof the hose.

Further objects are to provide a novel way of preparing the end of ahose having an intermediate reinforcing shell so that the reinforcingshell may be engaged by a surroimding fitting placed over the end of thehose.

Further objects are to provide a novel form of hose connection and amethod of forming the same which, when applied, has an internal neckring formed by the connection and produced by forcing the connectionendwise through a die.

A further object is to provide a hose connection which has a flare,taper. or enlargement intermediateitsendswhichmaybeexternalorintemal orboth. and which when the connection is appliedtoahoseand clampedinplace,maybe utilized to form an internal ring or neck ring.

Further objects are to provide a hose connection which has an upperflare which provides a construction that avoids any danger of breakingor shearing during contraction, and permits the contraction to extendupwardly as close to the end of the coupling as desired.

Further objects are to provide a hoseconnectionthatissoconstructedtbattheexcessmaterialofthehoseisallowedtoescape,andwhichwill compensate for any slight differences that; may exist duringmanufacture.

Embodimentsof the invention are shown in the ace drawings, in which:

Figure 1 is a view showing the connection and prepared hose about to beassembled, such view showing the connection partly in section.

FlgureZisaviewcorrespondingtoFlgurei showing the hose led within theconnection and showing the parts in position to! pressed through thedie.

Flgure3isaviewcorrespondingtol 'lgure2 showing the parts aftercontraction with the connection still in the die.

mgure'iisaviewcorrespondingtol 'lgurel showing a further form of theinvention, such view showing the connection in section and the preparedhose about to be assembled on the connection.

Figure5isaviewcorrespondingtoFlgure4 showing the connection contractedwith the parts still within the die.

Figurecisaviewoi'afurtherform showinga difl'erent type of connection anda diii'erent type of hose which may be used therewith.

Figure 7 shows the form of Figure 6 after contraction and while theparts are still in the die.

FigureBisaview ofastillfurtherform ofconnectionshowingthehoseabouttobeassembled thereon.

Flgure9isaviewcorrespondingtollgure8 showing the parts after contractionand while the connection is still within the die.

Inthedescription andinthefclaimsthedifferent parts of the connectlouwillbe referred toastheumenmiddleandlowerparts. The drawingsshow theconnectionin avertical positiontocorrupondtothis,butitis to bedistinctly understood that this terminology is used solely to secure andprecision indeflningtheparmasitisobviousthattheconnectionisusedinhorisontaLverticaLorinverted positions.

Referrlngtol'lguresl,2.and3,itwillbeseen that the comprises a metalsleeve or memberwhichhasaheadorbodyporflonl which may be provided withmale or female portionaafemalethreadedportionibeingshownbywayoflllustratlon. ThebodyportionlispreferablyofadiameterindicatedbythereferencecharscterAinFlgln'el.'Ihisbody-portionlwillbereferredtoastheupperporflon.'Iheconnectionextendsdownwardlysndisboredouttosdiameterindicatedbythereferencecharacter B and is provided withright hand threads. Thisthreadedupperboreisindicatedbythe referencecharacter I.

The connection is provided with a lower bore 4 which is providedpreferably with left hand threads and is of a diameter indicated by thereferencecharacterCinFigurei. Thelowerbore,itwillbenotedfroml"lgurel,isofa larger diameter than the upper bore8. The two bores are joined by a conical portion or internal flare I.

The outer portion of the connection is provided with an intermediate ormid-flare 0. It is tobenotedthattheconicalinnerboretandthe outer taperedportion are not parallel, as shown in the form illustrated in Figures 1and 3, although it is obvious that they could be made parallel withoutdeparting from the invention in its broadest aspects. However, it ispreferable to form them as indicated in Figure 1, so that a somewhattriangular cross section of metal is provided at this point. The lowerportion of the connection is provided with a cylindrical outer surfaceI, as may be most clearly seen in Figures 1 and 2.

The connection is provided with a tubular central insert 0 which ispreferably screw threaded into the upper portion or body portion, asshown. This tubular insert may be approximately or slightly greater thanthe internal diameter of the hose The hose 9 is preferably of the highpressure type and preferably is provided with a woven outer coveringindicated at it in Figure 1. It is also provided with a braidedwirereinforcing portion II, which is most clearly shown in thesectionalportionsofthehoseinFiguresland 3. In the construction of thesehoses, a rubber body portion II encloses the reinforcing metallicbraided wires II, as shown in Figure 3. and the cotton or other outerfabric covering completely surrounds the body portion of the hose.

In practicing this invention, the hose is stepped or, in other words,provided with a reduced end is, cylindrical in contour and of a materiallength. It is preferable to provide a tapered or conical or beveledportion it which Joins the two cylindricalportionsland llofthehose.

One way in which the stepped end of the hose may be formed is asfoliows:-The end of the hoseisplaceduponamandrelandisground down to formthe cylindrical reduced portion or stepped portion II and the beveled orconical portion It. This method of forming the end of the hose has beenfound to provide the utmost accuracy in properly shaping the hose. It isto be noted from Figure 1 that the external diameter of the portion I3is slightly greater than the bore B and that a small film of rubber isleft over the braided reinforcing wires II. It is also to be noted thatthe fabric covering or other reinforcing outer covering lil extends upto the edge of the beveled portion ll.

It is, of course, within the province of this invention to provideadditional reinforcing means in the hose, for instance, cotton braidingmay supplement the wire braiding ii, if desired. Itis, of course, withinthe province of this invention to omit the fabric outer covering IO, ifdesired.

After the hose has been prepared, as described above, it is nextassembled, as shown in Figure 2, by forcing the hose into theconnection. It

is preferable to provide a clamp, not shown, for the hole so as-to aidin its rotation as it fits tightly within the upper bore I of theconnection. It is actually screwed into place imtil it occupies theposition shown in Figure 2. It is to be noted that the lower bore 4,which is provided with threads reversely arranged to the threads of theupper bore, is of such a diameter, as indicated by the referencecharacter C, that it is greater than the outer diameter A of the hose,and consequently the hose does not touch the threads of the lower bore 4during this assembling or inserting of the hose.

The diameter D of the die is indicated in both Figures 1 and 2, and itwill be seen that such diameter is greater than the diameter of theupper end of the fitting or connection.

After the parts are assembled, as indicated in Figure 2, the hose ispassed through the die I5, see Figure 2, with the lower end of theconnection engaging the slanting portion or conical portion it of thedie. The lower portion of the die is cylindrical as indicated at II.This die may be a split die or a one-piece die, as desired, or as foundmost expedient.

When the parts are in the position shown in Figure 2, the connection isforced downwardly through the die. The parts may be pressed or forcedcompletely through the die, if desired, and this is the preferredpractice, that is to say, forcing them completely through the die.

From Figure 3 it will be seen that the upper end or body portion I ofthe connection is not contracted in this form of the invention, andalso, it will be seen that this portion clears the die.

During the contracting operation the triangular portion formedbetweenthe conical inner bore 5 and the conical outer surface 6 movesinwardly and forms an inwardly extending ring or neck ring, as indicatedat It, which forms a contracted portion internally of the connection.

other similar material, it securely anchors this outer sheath of the'hose and thus, by gripping the outer covering. prevents the likelihoodof the breaking of the hose at this point.

However, it is to be noted particularly that by means of this inventionthe reinforcing braided wires are firmly engaged by the coupling, and asthese wires furnish the major strength of the hose, it is apparent thatthe maximum grip upon the flrmest portion of the hwe is secured by thisconstruction.

It is to be noted, also, thatv the contraction starts at the lower endof the connection and thus prevents the flowing of the rubber outwardlyfrom the connection.

In the form of the invention shown in Figures 4 and 5, the sameinventive idea is followed. However, in-this form of the invention theconnection comprises an upper or body portion l9 which is of slightlyless diameter than the intermediate, cylindrical portion 20. Preferablythese parts are connected by a slight bevel 2|, as shown. The lowerportion of the connection is provided with an enlarged cylindricalpartorlowermember22,andabeveledoreonicalsurfaceliioinsthecylindricalparhllandforming teeth, as indicated, and with a lower, larger bore 2|providedwithlefthandthreads formingteeth,asshownin 4. bores are joinedbya conical portionisprovidedwithannularringsformingteethalthough,obviously.thisportionoouldbetbreaded without departing from the spirit of the inven tion. Theannular rlngs.however,are

Itistobenotedthatthethus fargivenisverysimilartothatshowninl'igure 1.However, the diameter of the intermediate portion 2| is slightly largerthan the diameter of the die which, for convenience, is indicatedatEinl'igure4. Theconnectionis provided with a tubular, centrally arrangedinsert 21, as previously described. If desired, this insert may beprovided with barbs or rings. as indicated by the reference character28, although the insert could be made smooth without departing from thespirit of this invention. Thehoseisstepped,aspreviously to provide areduced, cylindrical end 2! of materiallength which is preferablyconnected with the cylindrical body portion II of the hose by means ofthe tapered portion II, as previously described.

The invention, however, shown in Figures '4 and 5, diflers from thatpreviousLv described in other particulars. For example, the upper end ofthe upper bore 24 is provided with a conical portion or upper flare l2and the body portion- 01' the connection is provided with an overflowhole 33 for the displaced rubber, which will be hereinafter described.

Thepartsareledaspreviouslydescribed. Itistobenotedthatthediameteroi' thecylindrical, reduced portion 20 of the hose is greater than the internaldiameter 1" of the upper bore 24, as indicated in Figure 4. Further, thediameter G of the hose is lea than the diameter H of the lowerbore 2! ofthe connection.

After the parts are led, as previousb dey scribed in connection withFigures 1 to 3, the con-' nection is forced through the die a, such dieDuring the contracting operation it is also to be noted that theintermediate portion 2| of the connection is contracted as well asthelower portion 22. The conical bore or portion I2 prevents shearing ofthe material and permits the upper portion to be contractedwithout/excessive stresses being imposed upon the metal. Thiscontraction oi'theupperportion forcestheteethinto ment with the wirebraiding 31 of the hose and alsoforms aneck ringor'moregreatlycontmetedportion, indicated generally at 38, which also firmly engages thebraided wires.

In the form of the invention shown in Figures 6 and 7, adifferent typeofconnection and a different type of hose are employed. This connection isa cylindrical member, as indicated at 38. and is provided with an upperbore II which is equippedwith lefthand threadsand alower,enlargedborellwhichisequippedwithrighthand threadattmsprovidingteeth,aspreviouslydescribed.Itispreferabletoprovideanintermediateboreflfreefromteethandofasiseapproximatelythatoi'theouterdiameterofthehosell. 'lhishosellisofgreaterdiameterthanthediameteroftheupperborellasshcwninrigure(Landitispreferabletouseahoseprovidedwithametalcore,sothatthiscoreactssomewhatliketheinsertofthepreviomlydescribedformsandpreventscollapsingofthehose.Itisobviolmhowwenthatauinsertcouldbeusedwiththeconnectionshowninl'igurellandadifferent typeofhosecouidbeifsodesired.

Withthisformoftheinventionthedietakesa different shape from thatpreviously described. The die is indicated in Figure 'l by the referencecharacter ll, andit isprovided with a lowercylindricalportionlljoininganuppercylindrical-portionlloflargerdiameterbymeansofabeveledportionll. Theupperportion ofthedieis beveled,asindicatedatll. Inthisecasetheconnection is not presedcompletely through the die. Itispressedinto theposition shown sothat thecontraction stops short of the upper end of the upper bore ll. Theintermediate portion 42 stops at approximately the beveled portion 48 ofthe die andisoontractedmsshownbythe reference characterfl'inl'lgure'l.Thiscontractingoftheintermediate portion rocks the lower cornersinwardly and forms a neck ring 50' which extendsinwardlyagreaterdistancethananyotherportion of the connection.

It is obvious that other means could be employed for forming this neckring. For example, asshowninmgures8and9,theconnectionmay consist of amember I ll which is cylindrical throughout its major portion, but whichis providedwithanenlargedannularintermediatepart II. The internal boreof the connectionis of uniform diameter throughout, as indicated at 52,and is provided with threads which form teeth, as previously described.The bore is of lesser diameter than the external diameter of the hose53, suchhosebelngeitherpiamorprowided witha fabric woven outer sheath itand being provided with a braided wire intermediate sheath 55.

The connection is provided with a centrally arranged, tubular insert Itas previously described.

Thehoaeised,ashasbeenpreviously stated, by screwing it into place.Thereafter the connection is forced into a die 51, see Figure 9, whichis provided with a cylindrical portion 58 and a conical upper portion59. The contraction stops below the upper end of the inner bore 52, asshown in Figure 9. The annular enlargement Si is forced inwardly,thereby forcing the metal of the connection inwardly and forming a neckring or contracted ring indicated generally at 69.

It is to be distinctly understood that the parts of the different typesof connections may be inas desired, that the threads may be single ordouble. that the intermediate portionsasshowninl'igureslanddmaybeprovided with annular rings cut therein or aspreviously described, and that other changes could be made from theprecise disclosure in the drawings without departing from the spirit ofthis invention.

Itistobedistinctly notedthatalthoughthe conical connecting portionbetween the reduced cylindrical end and the body portion of the hose isprefa'red, that nevertheless this conical portion could be omitted and amore or less abrupt shmrlder formed at this point. The correspondingconnections would, of course, be similarly changed.

This connection and the stepped hose' are intended primarily for highpressure, and it will be seen that the hose ls very firmly secured tothe connection and that there is substantially no chance of the hoseblowing from the connection or of a leak occurring.

It is to be particularly noted that by stepping the hose as indicated,the braided reinforcing wires are actually gripped by the internal teethof the connection and thus an extremely strong grip is secured. a

While it is preferred to use a metal insert carried by the connectionitself, it is nevertheless to be understood that the metal core withinthe hose, if sufilciently strong, can be looked upon as an insert toprevent collapse of the hose from the contraction of the connection. v

It will be seen further that this invention provides a connection forhose which will not blow oil and which will not permit leakage evenunder the strain of high internal pressure.

It is also to be noted that this invention is particularly applicable tohose in which braided wire supplies the chief strength; and thisinvention provides means for getting, in eflect, two grips or what maybe described as a two-step grip on the hoseone grip directly on thewires below the outer surface of the hose and the other grip upon theouter surface.

It is to be distinctly understood that the reinforcing sheath may besingle or it may be double as shown in the drawings.

Although the invention has been described in considerable detail, it isto be understood that such description is intended as illustrativerather than limiting, as the invention may be variously embodied and isto be interpreted as claimed.

Some features described hereinabove and shown in the drawings may besummarized or emphasized as follows:

Referring first to said lower portion 1 of the sleeve, Fig. 1, whichportion may be referred to as the skirt." The following features are tobe noted:

The concept or main idea of the skirt is as follows: An intense gripnear the end of the hose, and a lesser grip'further back, such lessergrip protecting the soft outer covering, while the intense grip extendsits influence to the wire braiding or other reinforcement. Theconstruction which makes it possible to reach further into the center ofthe coupling, and thus to exert the said more intense grip, is what maybe called the "two bore" construction, that is, the fact that the borein the upper portion of the sleeve is smaller than that of the lowerportion.

As an aid in the aforesaid matter, the stepping down" of the hose, for adistance equal to approximately half the length of the sleeve of thecoupling, is resorted to.

' It will be noted that, after contraction, the bore of thelower'portion of the sleeve is greater than that of a part at least ofthe upper portion.

Similarly it will. be noted that a portion at least of the upper portionof the sleeve has a greater thickness of side well than the lowerportion has.

It will be noted also, that the length of the "skirt" is substantial,being sufllcient to protect the upper edge ll of the outer covering ofthe hose, thatis, the "step in the hose, and to protect also a fairportion of the length of the outer covering below the step. v

Also it will be noted that. in the preferred form, the external diameterof the skirt, after contraction, is the same as that of the upperportion of the sleeve.

Also it will be noted that the coupling, before contraction, may bedescribed as bell-mouthed." That is, its external shape conforms, tosome extent, to its internal shape, said internal shape having the twobores aforesaid, to conveniently receive the "stepped end of the hose.

ing now to those features of construction which refer to what is hereincalled the "neckring, the following features are to be noted:

The broad concept of the ring neck is as follows: An external ring isconverted into an internal one by pushing the coupling through acircular die. This broad concept is well shown in the modification whichis illustrated by Figs. 8 and 9. That is to say, the modification shownin Figs. 8 and 9 is the simplest and most basic form of the ring-neckidea.

- The concept of the preferred form is the same as that of the broadform, with the limitation.

added that the external ring is wedge-shaped in cross-section, and thatthe annular wedge thus formed is pressed inward by the die may be calleda swinging movement,, he bottom of the wedge moving inward while e pointof the wedge remains almost stationary.

The movement just described, apart from its other advantages, has anadvantage in manufacture, namely, that no sideway boring out of theupper part of the sleeve is necessary. That is to say, a tool, whichmoves in axial direction only, can bore the whole of the sleeve of thecoupling.

I claim:-

1. A hose connection comprising a body portion having a sleeveprojecting therefrom, said sleeve having an upper bore and a lower boreof difl'erent diameters, and said body portion having a conical recessjoining the upper end of the upper bore, said conical recess forming anoverflow space for the material of the hose, and act: ing as a stop forthe end of the hose.

2. A connection for a hose end, said connection comprising a bodyportion and a sleeve projecting therefrom and adapted to be contractedupon the end of a hose, said connection having an overflow hole for thesurplus material of the hose during contraction. 3. A hose clampcomprising an end wall and a sleeve projecting therefrom, said sleevebeing adapted to receive the end of a hose and to be contracted to gripthe same, said sleeve, having in the course of its length a portionwhich forms a ring substantially triangular in section, having twointernal annular faces and one external annular face, said two inwardfaces being, before contraction, one of them generally cylindrical andthe other non-cylindrical, and being, after contraction, bothsubstantially conical, meeting in an inwardly projecting annular ridge,which bites into the substance of the hose.

4. A hose clamp comprising an end wall and a sleeve projectingtherefrom, said sleeve being adapted to receive the end of a hose and tobe contracted to grip the same, saidmleeve, before contraction,comprising, externally, two portions of different diameters joined by anexternally tapared portion, and, internally, two bores of difl'erentinternal diameters, joined by an internally tapered portion, saidinternal taper being steeper than said external taper, whereby a ringsubstantially triangular in section is formed in the course of thelength of said sleeve after said r'sleeve has been contracted,

with what aportionofitsoutercovering,foradistance its approximatelyequal to the length of said met portion of said sleeve, whereby saidcontraction, is adapted to reeeive and to fit snugly around said steppedend after contraction, the lower being of less internal than that ofsaid lower portion, whereeeve is remote from the wall, and both boresbecoming reduced as a result of said contraction, the larger borehowever still remaining the larger.

7. Ahosecouplingcomprisinganendwallanda sleeve projecting therefrom,said sleeve being adaptedtoreceivethe endofahose and tobe contracted topermanmtly grip the same, said sleeve having an upper portion, nearersaid wall, and a lower portion, a part at least of said upper portion.before contraction. having its side wall of greater thickness than theside wall of said lower portion, and, after contraction, said part ofsaid upper portion being of less internal diameter than said lowerportion, said lower portion being of substantial length, whereby it isadapted to protect the outer covering of the hose.

8. Ahosecoupling comprisinganendwalland a sleeve projecting therefrom,said sleeve being adaptedtoreceivethe endofahoseandtobe contracted topermanently grip the same, said sleeve having an upper portion, nearersaid wall, and a lower portion, said sleeve, before contraction, beinginternally bored with two bores, the larger bore being in said lowerportion, and being, before contraction, of two diilerent diametersexternally. the larger diameter being upon said lower portion, and,after contraction. said sleeve being cylindrical externally over bothsaid portions.

9. Ahosecouplingcomprlsinganendwalland a sleeve projecting therefrom,said sleeve being adaptedtoreceivetheendofahoseandtobe permanentlycontracted to grip the same, said sleeve, before contraction. havingupon a portionofitslengthalocaliaedexcessofexternalmetal,whichexternalexcessis,aftercontraction, replaced by an inwardlyprotruding localized projection, existing where none existed beforecontraction, due to said external excess having been pressed inward,such inward projection protrading into the of the hose to grip the same.

10. A hose coupling an end wallandasleeveprojectingtherefrmsaidsleevebeingadaptedtoreceivetheendofahoseandtobecontractedtogripthesameasubstantial portion of the length of saidsleeve having, before contractiomitsinternalboreparallaandits externaldiameter greater at its end further fromsaidendwallthanatih-nearerendsaldportion having, after contraction, itsexternal diameter uniform,anditsinternaldianieterlessatitsendfurtherfromsaidendwallthanatitsnearerend.

lLAhosecoupiingcomprisinganendwalland a sleeve projecting therefrom,said sleeve being adaptedtoreceivetheendofahoseandtobscontractedtogripthesame,saidsleevehaving,in the course of its length, aportion substantially in the form of an annular wedge, the thick end ofsaid annular wedge being the end remote fromsaidendwaiLsaidannularwedgebortionbeing. before contraction, cylindricalinternally, and, after contraction, substantiallyconicalinternally,saidthickendthereofthenconstituting an inwardlyprotruding ring bitinginto the substance of the hose.

12. Ahosecouplingadaptedtoreceivetheendofahoseandtobepermanentlycontractedto gripthesame, said coupling,beforehavinswnaportionofitslengthalocaliaedexcessofexternalmetabwhichuternalexcesis,after contraction, replaced by an inwardly protruding localisedprojection, existing where none existed before contraction, due tosaid/external excess having been pressed inward, such inward projectionprotruding into the substance of the hosetogripthesame. s

13. A hose coupling an end wall and asleeve projecting therefrom.saidsleevebediameter in such way that they together form one continuouscylinder, as viewed externally.

14. In combination, a hose couplinglengthofhose,saidcouplingbeingadaptedto permanently contracted inwardupon to grip the same, said hose having its ducedby theremovalofiiaoutercoveringtoa said two portions of the hose to be ipp d.when the coupling is contracted.

15. Ahose coupling comprisinganendwalland a sleeve projecting downwardlytherefrom, which sleeveistobe permanentlycontracted ontothe end of ahose to grip the same, said sleeve comprising an upper portion, anintermediate, generally outwardly sloping portion, and a lower portion,said three portions together forming a continuous wall, saidintermediate portion havinguponitsinwardfaceasubstantiallydrcumferentialinwardly projecting ridge. projecting from said general outward slope ofsaid intermediateportiomthe summltofsaidridgebeing, before suchcontraction. substantially at the samedistancefromtheaxisofsaidsleeveasisthe inward face of said upperportion, whereby as-' semblyof thehoseendintosaidupperportionispermitted, but, after said contraction, saidsurnmitbelngnearersaidaxlsthanissaidwalLbitlngintothesubstanceofthehosetogripthesame. stepped by theremoval of itsouter covering 16. A hose connection for a flexible hose having to asubstantial depth, and for a substantial distance, thereby forming twoportions of diiferent diameters, a stepped-down portion and a thickerportion, as viewed before such contraction, there -being provided in thecoupling, around a portion at least of the length of said stepped-downpart of the hose, metal in excess of what metal would be needed toprovide a sleeve of substantially uniform thickness of wall, throughoutthe length of the sleeve, following the surface of the hose as stepped,said excess metal serving to facilitate said contracting when it isdesired to press with extra intensity upon a part at least of the lengthof said stepped-down portion of the hose.

is to be permanently contracted inward upon thehosetogriptbesamasaidhosehavingitsend Josupn PETER mama.

